Eichaed m



(No Model.)

R. M. PHELAN.

DOPE GUP.

Patented Apr. 26, 1887.

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UNITED STATES.

PATENT OFFICE.

RICHARD M. PHELAN, OF DETROIT, MICHIGAN, ASSIGNOR TO THE MICHI- GAN LUBRIOATOR COMPANY, OF SAME PLACE.

DOPE-CUP.

SPECIFICATION forming part oi' Letters Patent No. 361,891, dated April 26` 1887.

Application filed August 1l,l1886. Serial No. 210,632. (No model.)

To all whom, t may concern.-

Be it known that I, RICHARD M. PHELAN, of Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in DopeCups, of which the following is a specification.

My invention relates to that class of lubricators commonly called dope-cups, which are used for lubricating the moving parts of machinery, and in which the lubricant is expelled from a chamber or receptacle by the action of a spring-pressed plunger controlled by a reguifeatures and details of construction, which will be pointed out and explained.

In the drawings, Figure l is a vertical central sectional view of my improved device charged with lubricant; Fig. 2, a similar view of the device empty; Fig. 3, a horizontal section on the line a: x.

A indicates the cylindrical shell or receptacle, B a piston fitting therein, and C a cap or cover screwing upon the upper end of the cylinder.

The cap or cover Gis provided with an upright neck o r extension, D, and at the base of the neck a flange or ledge, a, extends inward, so as to nearly close the opening within the neck, as shown in Fig. 1. Upon this ledge rests, under certain conditions, an elongated block or nut, E, of angular cross-section and threaded internally to receive a screw-stem, F. The angular block or nut E is advisably provided with a lateral annular ange, b, at its base, and at its upper end projects out through a hole or opening in the top of a cap, G, screwed upon the upper end of neck D. The screw-stem F is provided at its upper end with a hand-wheel, H, and at its lower end with a longitudinal socket, I, thelatter being adapted to receive a stem or rod, J,- formed upon or secured to the upper face of the piston B.

Surroundingkthe stem .I is a spring, K, which bears at its lower end upon the upper face of the piston and at its upper end against the lower end ofthe screw-stem F.

Surrounding the block E, and bearing at opposite ends against the cap G and flange b, is a spring, L, which tends to keep the block E down upon the annular iiange or'ledge a., and of course in pressing the block E down it carries with it the screw-stem F.

In the bottom of the cylinder or receptacle A is a central passage, c, through which the material is discharged. Intersecting this passage is a'valvestem, M, provided at its outer end with a hand-wheelor a button, N, and having an external screw-thread which screws into a hole tapped into the base of the chamber A. At a distance from the inner end this cylindrical stem Mis circumferentiallygrooved or reduced in diameter, so that when the reduced portion is in line with the passage the lubricant may escape. By turning the stem it is moved longitudinally andthe passage c closed by the end of the stem.

When the cylinder A is filled with lubricant, as shown in Fig. l, both of the springs K L are put under4 suitable compression by screwing down the stem Fsuch distance as may be required t-he pressure, of course increasing with the descent of the stem.y In thus turning the screw-stem the spring K, between its lower ,end and the piston, will be oompressed to a certain extent. When this degree of compression is reached, the turning of the screw causes a compression of the spring L, thescrewstern being held against further or free descent by the resistance of spring K, while by its rotation the screw-stem causes the threaded block or nut E to move upward and to carry with it the spring L. During this operation the valve for controlling the outletpassage c should be closed, so as to prevent the forcing out of the material.

As soon as the valve-stem Mis turned to bring its reduced portion in line with the passage c, the spring L, acting upon the block E, tends to urge the screw-stem F downward, and as the lower end of the latter bears upon the spring K the force exerted by the upper spring is received upon the lower one. spring bears directly upon the piston, the combinedaction of the springs is exerted upon the the piston to force thelubricant out. By this construction it will be observed that I secure the combinedv actionl of the two springs until the block or nut E rests upon the ledge b, or until the lubricant is all discharged. Inthis way a very uniform action is secured and suficient play and elasticity of the springs at.

tained to insure complete discharge of the luburicant without undue pressure when the cup is full.

Should it be desired to manually force a quantity of grease out of the cup, it is only necessary to press down with the hand upon the screw-stem and move the piston through or by means of the spring K. As soon as the hand is removed from the screw-stem the spring K returns the parts to their normal po sitions.

Instead of providing the block E with a iiange, as b, the block may be made shorter, so that the spring` Lmay rest upon its top. In such case, of course, the block E would not project up through the cap G.

When the construction shown in Figs. I and 2 is adopted, the block E, projecting up vthrough the cap G, will indicate the amount of lubricant in the vessel.

Having thus described my invention, what I claim is- 1. In a do'pecup, the combination, with a receptacle, A, of a piston, B, therein provided with a rod or stem, J, a cap, C, upon the receptacle A, a block or nut, E, resting upon the As the lower 2. In a dope-cup, the combination, with areceptacle, A, of a piston, B, therein, a cap, C, for the receptacle provided with a flange, a, between the piston and the top of the cup, anut, E, resting upon the ilangc, a threaded-stem, F, passing through the nut or -block E, and a spring, K, between the stem and piston.

3. In a dope-cup, the combination, with a receptacle for lubricant, of a piston within said receptacle, anda cap or cover for the same, a nut or block passing through said cap, a screwstem passing through said nut, a spring resting upon the nut or block and bearing against the cap or coverand a spring between the piston and the screw-stem and bearing against both.

4. In a dopecup, the combination, with chamber A, of a piston, B, provided with stem J, screw-stem F, provided with socket I, a block or nut, E, adapted to receive the screwstem and to rise and fall bodily therewith, and a spring, K, between the screw-stem and the piston.

i 5. In combination with a dope-cup provided with an upper chamber, a lower chamber, and an intermediate flange or ledge, as a, a piston and a spring in the lower chamber, asliding block or nut and a spring in the upper chamber, and a screw-stein passing through the nut or block and bearing upon the spring in the lower chamber.

6. In combination with a dope-cup provided with a lubricantreceptacle, a cap or cover therefor and a piston therein, a sliding block or nut, a spring between the cap and the block, a spring bearing upon the upper 'face of the piston, and a screw-stem passing through the sliding block and bearing upon the lowerspring.

' JNO. B. Conrrss, F. W. MARVIN. 

